Wilhelm noelte



I UNITED STATES PATENT OEEICE.

WILHELM NOEL'IE, OF ,HOBOKEIL NEW JERSEY.

' LATCH.

SPECIFICATION forming part of Letters Patent No. 372,815, dated N'ovember 8, 1887.

Application filed July 7, 1887. Serial No. 243,613. (No model.)

To all whom it may concern:

volved by a button, j.

Beit known that I, WILHELM N OELTE, a citizen of Germany, residingin Hoboken, Hudson county, State of New Jersey, have invented a new and Improved Latch, of which the following is a specification.

This invention relates to a latch having but a single bolt. This bolt may be thrown out of the case to a greater or less extent. It is operated by the ordinary turning-knob when it projects but little out of the latch-case, and it may then be shot out to a greater extent by the useof the key. Thus the same bolt acts as a latch and as a locking-bolt. The latchcase is also provided with a slide similar to a latch, and which enables the bolt to be locked in its distended position from the inside of the room Without a key.

The invention consists in the various features of improvement more fully pointed out in the claim. Y

In the accompanying drawings, Figure l is a face view of the latch with the front plate removed, showingthe bolt but partially shot Fig. 2 is a similar view with the bolt entirely shot out. Fig. 3 is a longitudinal section on the line w Fig. 2.

The letter c represents the latch-case, in which slides the bolt b,which is provided at its rear end with a pin, c. This pin enters an angular slot, d, on a lever, d, pivoted at d2 `and slotted at d3, for the .reception of the knobspindle c.

f is a stop placed against the lower side of the bolt and near its rear edge when the bolt is entirely shot out, as in Fig. 2. `Spring'sg g' bear, respectively, against shoulders on the front and rear of the bolt b.

h h are the tumblers, pivoted at iz and provided with springs h2 abutting against pin h3. The tumblers have H-shaped slots that admit a pin, i, secured to the bolt b. Noses or projections h4 on the tumblersv may be depressed by a tlat plate, j, att-ached to and re- This button projects outside of the latch-plate and is accessible from the interior of the room. l

k is a slide or button attached to the bol b, and also projecting into the room through a slot in the latch-plate. By means of this slide the bolt may be shot in or out if the tumblers are cleared without the use of a key.

The operation of the device is as follows: The parts being in the position shown' in Fig.

l, the latch is adapted to be operated by the knob e of the knob-spindle e.

In this position the pin c occupies the rear branch of the angular slot d', and by revolving the knobe the bolt may be drawn entirely into the case. On the release of the knob the spring g will push the bolt out to a short extent, limited by the pin t', bearing against the rear shoulder, i', of the tumbler-slot. When the latch is to be locked by the key, the latter is introduced opposite hole m and will lift the tumblers s0 thatthe pin z' clears shoulder i', when the bolt may be shot ont to its greatest extent, as in Fig. 2. In this position the pin `will have entered the forward part of the tumbler-slots, and the shoulder t2 will prevent the bolt from being withdrawn without the use of the key. As the bolt has been shot out, the pin c will have been drawn forward, and after having passed the bend in slot d will have oscillated the lever d to occupy the position shown in Fig. 2. In this position the knob e' cannot be revolved, owing to the stop f being nearly or exactly opposite pin c, and thus the latch could not be opened though there were no tnmblers. To reopen the latch, the key is applied to raise the turnblers, throw the bolt back into the position shown in Fig. 1, and to swing the lever d backward on its pivot.

- If the bolt is to be shotout from the interior of the room by means of the slide lc, the button j" is first revolved, when the plate j will depress noses h4, and thus cause the tumblers h to be oscillated sufficiently to cause the pin i to clear shoulder 'L'. The spring g will then throw the bolt forward sufficiently to cause the pin c to enter the narrow central part of the tumbler-slot, after which there is no obstacle in the way of shooting the bolt out entirely by the slide k. To withdraw the bolt, the button j is again revolved to cause the oscillation of the tumblers and the consequent clearing of the shoulders i2 by pin z', aided by spring Q,when the bolt can be moved inward by the slide k.

What I claim is- The combination of bolt b, having pins z' c, with the slotted lever d, spindle e, stop f, springs g g', tumblers h, having noses h, and with the springs h2, plate j, and slide la, substantially as specified.

WILHELM NOELTE.

Witnesses:

F. v. BEIEsEN,

HENRY E. ROEDER.

IOO 

